This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A243438 #11 Nov 12 2023 09:30:30
%S A243438 23,31,103,751,4782991,282429536503,50031545098999729,
%T A243438 49269609804781974438694403402127765889
%N A243438 Primes of the form 3^k + 22.
%C A243438 Associated k: 0, 2, 4, 6, 14, 24, 35, 79, 178, 186, 230, ...
%H A243438 Vincenzo Librandi, <a href="/A243438/b243438.txt">Table of n, a(n) for n = 1..18</a>
%F A243438 a(n) = 3^A219042(n) + 22. - _Elmo R. Oliveira_, Nov 12 2023
%t A243438 Select[Table[3^n + 22, {n, 0, 500}], PrimeQ]
%o A243438 (Magma) [a: n in [0..200] | IsPrime(a) where a is 3^n+22];
%Y A243438 Cf. A000040, A219042 (corresponding k's).
%Y A243438 Cf. Similar sequences listed in A102903.
%K A243438 nonn
%O A243438 1,1
%A A243438 _Vincenzo Librandi_, Jun 05 2014